* Merge in Russell's HW workarounds, fix various problems
* with the timing registers setup.
* -- Benjamin Herrenschmidt (01/11/03) benh@kernel.crashing.org
+ *
+ * Copyright (C) 2006-2007 MontaVista Software, Inc. <source@mvista.com>
*/
#include <linux/types.h>
#define CTRL_P0EN (1 << 0)
/*
- * Convert a PIO mode and cycle time to the required on/off
- * times for the interface. This has protection against run-away
- * timings.
+ * Convert a PIO mode and cycle time to the required on/off times
+ * for the interface. This has protection against runaway timings.
*/
-static unsigned int get_timing_sl82c105(ide_pio_data_t *p)
+static unsigned int get_pio_timings(ide_pio_data_t *p)
{
- unsigned int cmd_on;
- unsigned int cmd_off;
+ unsigned int cmd_on, cmd_off;
- cmd_on = (ide_pio_timings[p->pio_mode].active_time + 29) / 30;
+ cmd_on = (ide_pio_timings[p->pio_mode].active_time + 29) / 30;
cmd_off = (p->cycle_time - 30 * cmd_on + 29) / 30;
- if (cmd_on > 32)
- cmd_on = 32;
if (cmd_on == 0)
cmd_on = 1;
- if (cmd_off > 32)
- cmd_off = 32;
if (cmd_off == 0)
cmd_off = 1;
}
/*
- * Configure the drive and chipset for PIO
+ * Configure the chipset for PIO mode.
*/
-static void config_for_pio(ide_drive_t *drive, int pio, int report, int chipset_only)
+static u8 sl82c105_tune_pio(ide_drive_t *drive, u8 pio)
{
- ide_hwif_t *hwif = HWIF(drive);
- struct pci_dev *dev = hwif->pci_dev;
+ struct pci_dev *dev = HWIF(drive)->pci_dev;
+ int reg = 0x44 + drive->dn * 4;
ide_pio_data_t p;
- u16 drv_ctrl = 0x909;
- unsigned int xfer_mode, reg;
+ u16 drv_ctrl;
- DBG(("config_for_pio(drive:%s, pio:%d, report:%d, chipset_only:%d)\n",
- drive->name, pio, report, chipset_only));
-
- reg = (hwif->channel ? 0x4c : 0x44) + (drive->select.b.unit ? 4 : 0);
+ DBG(("sl82c105_tune_pio(drive:%s, pio:%u)\n", drive->name, pio));
pio = ide_get_best_pio_mode(drive, pio, 5, &p);
- xfer_mode = XFER_PIO_0 + pio;
+ drv_ctrl = get_pio_timings(&p);
- if (chipset_only || ide_config_drive_speed(drive, xfer_mode) == 0) {
- drv_ctrl = get_timing_sl82c105(&p);
- drive->pio_speed = xfer_mode;
- } else
- drive->pio_speed = XFER_PIO_0;
+ /*
+ * Store the PIO timings so that we can restore them
+ * in case DMA will be turned off...
+ */
+ drive->drive_data &= 0xffff0000;
+ drive->drive_data |= drv_ctrl;
- if (drive->using_dma == 0) {
+ if (!drive->using_dma) {
/*
* If we are actually using MW DMA, then we can not
* reprogram the interface drive control register.
*/
- pci_write_config_word(dev, reg, drv_ctrl);
- pci_read_config_word(dev, reg, &drv_ctrl);
-
- if (report) {
- printk("%s: selected %s (%dns) (%04X)\n", drive->name,
- ide_xfer_verbose(xfer_mode), p.cycle_time, drv_ctrl);
- }
+ pci_write_config_word(dev, reg, drv_ctrl);
+ pci_read_config_word (dev, reg, &drv_ctrl);
}
+
+ printk(KERN_DEBUG "%s: selected %s (%dns) (%04X)\n", drive->name,
+ ide_xfer_verbose(pio + XFER_PIO_0), p.cycle_time, drv_ctrl);
+
+ return pio;
}
/*
- * Configure the drive and the chipset for DMA
+ * Configure the drive and chipset for a new transfer speed.
*/
-static int config_for_dma (ide_drive_t *drive)
+static int sl82c105_tune_chipset(ide_drive_t *drive, u8 speed)
{
- ide_hwif_t *hwif = HWIF(drive);
- struct pci_dev *dev = hwif->pci_dev;
- unsigned int reg;
+ static u16 mwdma_timings[] = {0x0707, 0x0201, 0x0200};
+ u16 drv_ctrl;
- DBG(("config_for_dma(drive:%s)\n", drive->name));
+ DBG(("sl82c105_tune_chipset(drive:%s, speed:%s)\n",
+ drive->name, ide_xfer_verbose(speed)));
- reg = (hwif->channel ? 0x4c : 0x44) + (drive->select.b.unit ? 4 : 0);
+ speed = ide_rate_filter(drive, speed);
- if (ide_config_drive_speed(drive, XFER_MW_DMA_2) != 0)
- return 1;
+ switch (speed) {
+ case XFER_MW_DMA_2:
+ case XFER_MW_DMA_1:
+ case XFER_MW_DMA_0:
+ drv_ctrl = mwdma_timings[speed - XFER_MW_DMA_0];
+
+ /*
+ * Store the DMA timings so that we can actually program
+ * them when DMA will be turned on...
+ */
+ drive->drive_data &= 0x0000ffff;
+ drive->drive_data |= (unsigned long)drv_ctrl << 16;
+
+ /*
+ * If we are already using DMA, we just reprogram
+ * the drive control register.
+ */
+ if (drive->using_dma) {
+ struct pci_dev *dev = HWIF(drive)->pci_dev;
+ int reg = 0x44 + drive->dn * 4;
- pci_write_config_word(dev, reg, 0x0240);
+ pci_write_config_word(dev, reg, drv_ctrl);
+ }
+ break;
+ case XFER_PIO_5:
+ case XFER_PIO_4:
+ case XFER_PIO_3:
+ case XFER_PIO_2:
+ case XFER_PIO_1:
+ case XFER_PIO_0:
+ (void) sl82c105_tune_pio(drive, speed - XFER_PIO_0);
+ break;
+ default:
+ return -1;
+ }
- return 0;
+ return ide_config_drive_speed(drive, speed);
}
/*
- * Check to see if the drive and
- * chipset is capable of DMA mode
+ * Check to see if the drive and chipset are capable of DMA mode.
*/
-
-static int sl82c105_check_drive (ide_drive_t *drive)
+static int sl82c105_ide_dma_check(ide_drive_t *drive)
{
- ide_hwif_t *hwif = HWIF(drive);
-
- DBG(("sl82c105_check_drive(drive:%s)\n", drive->name));
-
- do {
- struct hd_driveid *id = drive->id;
+ DBG(("sl82c105_ide_dma_check(drive:%s)\n", drive->name));
- if (!drive->autodma)
- break;
+ if (ide_tune_dma(drive))
+ return 0;
- if (!id || !(id->capability & 1))
- break;
-
- /* Consult the list of known "bad" drives */
- if (__ide_dma_bad_drive(drive))
- break;
-
- if (id->field_valid & 2) {
- if ((id->dma_mword & hwif->mwdma_mask) ||
- (id->dma_1word & hwif->swdma_mask))
- return hwif->ide_dma_on(drive);
- }
-
- if (__ide_dma_good_drive(drive) && id->eide_dma_time < 150)
- return hwif->ide_dma_on(drive);
- } while (0);
-
- return hwif->ide_dma_off_quietly(drive);
+ return -1;
}
/*
* This function is called when the IDE timer expires, the drive
* indicates that it is READY, and we were waiting for DMA to complete.
*/
-static int sl82c105_ide_dma_lost_irq(ide_drive_t *drive)
+static void sl82c105_dma_lost_irq(ide_drive_t *drive)
{
- ide_hwif_t *hwif = HWIF(drive);
- struct pci_dev *dev = hwif->pci_dev;
- u32 val, mask = hwif->channel ? CTRL_IDE_IRQB : CTRL_IDE_IRQA;
- unsigned long dma_base = hwif->dma_base;
+ ide_hwif_t *hwif = HWIF(drive);
+ struct pci_dev *dev = hwif->pci_dev;
+ u32 val, mask = hwif->channel ? CTRL_IDE_IRQB : CTRL_IDE_IRQA;
+ u8 dma_cmd;
- printk("sl82c105: lost IRQ: resetting host\n");
+ printk("sl82c105: lost IRQ, resetting host\n");
/*
* Check the raw interrupt from the drive.
* Was DMA enabled? If so, disable it - we're resetting the
* host. The IDE layer will be handling the drive for us.
*/
- val = inb(dma_base);
- if (val & 1) {
- outb(val & ~1, dma_base);
+ dma_cmd = inb(hwif->dma_command);
+ if (dma_cmd & 1) {
+ outb(dma_cmd & ~1, hwif->dma_command);
printk("sl82c105: DMA was enabled\n");
}
sl82c105_reset_host(dev);
-
- /* ide_dmaproc would return 1, so we do as well */
- return 1;
}
/*
* The generic IDE core will have disabled the BMEN bit before this
* function is called.
*/
-static void sl82c105_ide_dma_start(ide_drive_t *drive)
+static void sl82c105_dma_start(ide_drive_t *drive)
{
- ide_hwif_t *hwif = HWIF(drive);
- struct pci_dev *dev = hwif->pci_dev;
+ ide_hwif_t *hwif = HWIF(drive);
+ struct pci_dev *dev = hwif->pci_dev;
sl82c105_reset_host(dev);
ide_dma_start(drive);
static int sl82c105_ide_dma_timeout(ide_drive_t *drive)
{
- ide_hwif_t *hwif = HWIF(drive);
- struct pci_dev *dev = hwif->pci_dev;
+ ide_hwif_t *hwif = HWIF(drive);
+ struct pci_dev *dev = hwif->pci_dev;
DBG(("sl82c105_ide_dma_timeout(drive:%s)\n", drive->name));
return __ide_dma_timeout(drive);
}
-static int sl82c105_ide_dma_on (ide_drive_t *drive)
+static int sl82c105_ide_dma_on(ide_drive_t *drive)
{
+ struct pci_dev *dev = HWIF(drive)->pci_dev;
+ int rc, reg = 0x44 + drive->dn * 4;
+
DBG(("sl82c105_ide_dma_on(drive:%s)\n", drive->name));
- if (config_for_dma(drive))
- return 1;
- printk(KERN_INFO "%s: DMA enabled\n", drive->name);
- return __ide_dma_on(drive);
+ rc = __ide_dma_on(drive);
+ if (rc == 0) {
+ pci_write_config_word(dev, reg, drive->drive_data >> 16);
+
+ printk(KERN_INFO "%s: DMA enabled\n", drive->name);
+ }
+ return rc;
}
-static int sl82c105_ide_dma_off_quietly (ide_drive_t *drive)
+static void sl82c105_dma_off_quietly(ide_drive_t *drive)
{
- u8 speed = XFER_PIO_0;
- int rc;
-
- DBG(("sl82c105_ide_dma_off_quietly(drive:%s)\n", drive->name));
+ struct pci_dev *dev = HWIF(drive)->pci_dev;
+ int reg = 0x44 + drive->dn * 4;
- rc = __ide_dma_off_quietly(drive);
- if (drive->pio_speed)
- speed = drive->pio_speed - XFER_PIO_0;
- config_for_pio(drive, speed, 0, 1);
+ DBG(("sl82c105_dma_off_quietly(drive:%s)\n", drive->name));
- return rc;
+ pci_write_config_word(dev, reg, drive->drive_data);
+
+ ide_dma_off_quietly(drive);
}
/*
*/
static void sl82c105_selectproc(ide_drive_t *drive)
{
- ide_hwif_t *hwif = HWIF(drive);
- struct pci_dev *dev = hwif->pci_dev;
+ ide_hwif_t *hwif = HWIF(drive);
+ struct pci_dev *dev = hwif->pci_dev;
u32 val, old, mask;
//DBG(("sl82c105_selectproc(drive:%s)\n", drive->name));
* We only deal with PIO mode here - DMA mode 'using_dma' is not
* initialised at the point that this function is called.
*/
-static void tune_sl82c105(ide_drive_t *drive, u8 pio)
+static void sl82c105_tune_drive(ide_drive_t *drive, u8 pio)
{
- DBG(("tune_sl82c105(drive:%s)\n", drive->name));
-
- config_for_pio(drive, pio, 1, 0);
+ DBG(("sl82c105_tune_drive(drive:%s, pio:%u)\n", drive->name, pio));
- /*
- * We support 32-bit I/O on this interface, and it
- * doesn't have problems with interrupts.
- */
- drive->io_32bit = 1;
- drive->unmask = 1;
+ pio = sl82c105_tune_pio(drive, pio);
+ (void) ide_config_drive_speed(drive, XFER_PIO_0 + pio);
}
/*
/*
* The bridge should be part of the same device, but function 0.
*/
- bridge = pci_find_slot(dev->bus->number,
+ bridge = pci_get_bus_and_slot(dev->bus->number,
PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
if (!bridge)
return -1;
*/
if (bridge->vendor != PCI_VENDOR_ID_WINBOND ||
bridge->device != PCI_DEVICE_ID_WINBOND_83C553 ||
- bridge->class >> 8 != PCI_CLASS_BRIDGE_ISA)
+ bridge->class >> 8 != PCI_CLASS_BRIDGE_ISA) {
+ pci_dev_put(bridge);
return -1;
-
+ }
/*
* We need to find function 0's revision, not function 1
*/
pci_read_config_byte(bridge, PCI_REVISION_ID, &rev);
+ pci_dev_put(bridge);
return rev;
}
}
/*
- * Initialise the chip
+ * Initialise IDE channel
*/
static void __devinit init_hwif_sl82c105(ide_hwif_t *hwif)
{
DBG(("init_hwif_sl82c105(hwif: ide%d)\n", hwif->index));
- hwif->tuneproc = tune_sl82c105;
- hwif->selectproc = sl82c105_selectproc;
- hwif->resetproc = sl82c105_resetproc;
+ hwif->tuneproc = &sl82c105_tune_drive;
+ hwif->speedproc = &sl82c105_tune_chipset;
+ hwif->selectproc = &sl82c105_selectproc;
+ hwif->resetproc = &sl82c105_resetproc;
+
+ /*
+ * We support 32-bit I/O on this interface, and
+ * it doesn't have problems with interrupts.
+ */
+ hwif->drives[0].io_32bit = hwif->drives[1].io_32bit = 1;
+ hwif->drives[0].unmask = hwif->drives[1].unmask = 1;
/*
- * Default to PIO 0 for fallback unless tuned otherwise.
* We always autotune PIO, this is done before DMA is checked,
* so there's no risk of accidentally disabling DMA
*/
- hwif->drives[0].pio_speed = XFER_PIO_0;
- hwif->drives[0].autotune = 1;
- hwif->drives[1].pio_speed = XFER_PIO_0;
- hwif->drives[1].autotune = 1;
-
- hwif->atapi_dma = 0;
- hwif->mwdma_mask = 0;
- hwif->swdma_mask = 0;
- hwif->autodma = 0;
+ hwif->drives[0].autotune = hwif->drives[1].autotune = 1;
if (!hwif->dma_base)
return;
* Never ever EVER under any circumstances enable
* DMA when the bridge is this old.
*/
- printk(" %s: Winbond 553 bridge revision %d, BM-DMA disabled\n",
- hwif->name, rev);
- } else {
- hwif->atapi_dma = 1;
- hwif->mwdma_mask = 0x04;
-
- hwif->ide_dma_check = &sl82c105_check_drive;
- hwif->ide_dma_on = &sl82c105_ide_dma_on;
- hwif->ide_dma_off_quietly = &sl82c105_ide_dma_off_quietly;
- hwif->ide_dma_lostirq = &sl82c105_ide_dma_lost_irq;
- hwif->dma_start = &sl82c105_ide_dma_start;
- hwif->ide_dma_timeout = &sl82c105_ide_dma_timeout;
-
- if (!noautodma)
- hwif->autodma = 1;
- hwif->drives[0].autodma = hwif->autodma;
- hwif->drives[1].autodma = hwif->autodma;
-
- if (hwif->mate)
- hwif->serialized = hwif->mate->serialized = 1;
+ printk(" %s: Winbond W83C553 bridge revision %d, "
+ "BM-DMA disabled\n", hwif->name, rev);
+ return;
}
+
+ hwif->atapi_dma = 1;
+ hwif->mwdma_mask = 0x07;
+
+ hwif->ide_dma_check = &sl82c105_ide_dma_check;
+ hwif->ide_dma_on = &sl82c105_ide_dma_on;
+ hwif->dma_off_quietly = &sl82c105_dma_off_quietly;
+ hwif->dma_lost_irq = &sl82c105_dma_lost_irq;
+ hwif->dma_start = &sl82c105_dma_start;
+ hwif->ide_dma_timeout = &sl82c105_ide_dma_timeout;
+
+ if (!noautodma)
+ hwif->autodma = 1;
+ hwif->drives[0].autodma = hwif->drives[1].autodma = hwif->autodma;
+
+ if (hwif->mate)
+ hwif->serialized = hwif->mate->serialized = 1;
}
static ide_pci_device_t sl82c105_chipset __devinitdata = {
projects / linux-2.6-omap-h63xx.git / blobdiff